Page 1 of 137
NICET In-Building Public Safety Communications
(IB-PSC) Technician Level I exam QUESTIONS AND
DETAILED SOLUTIONS JUST RELEASED
NICET In-Building Public Safety Communications (IB-PSC) Technician Level I exam bank
Point-Form Summary of Exam Coverage
• NFPA 1225 (2022 edition) – primary standard for ERCES design, installation, and maintenance
• NFPA 70 (NEC) – Articles 250 (grounding/bonding), 810 (radio equipment), 820 (coaxial cable
systems)
• NFPA 72 – monitoring of ERCES by building fire alarm system
• IFC – 95% general area / 99% critical area coverage requirements
• RF theory – decibels (dB), dBm, gain, loss, attenuation, isolation, oscillation
• System components – BDA (bi-directional amplifier), donor antenna, distribution antennas,
splitters, couplers, attenuators, terminators
• Cable installation – bend radius, fire stopping, support spacing, connector termination, pull
tension
• Grounding and bonding – NEC Article 250 compliance, ground loops, continuity to building
electrode
• Battery backup – minimum 12-hour standby capacity (NFPA 1225), battery type (SLA, LiFePO₄)
• Coverage testing – DAQ (Delivered Audio Quality) minimum 3.0, signal strength (dBm)
• PIM (Passive Intermodulation) – testing passive components to prevent distortion
• Safety – RF exposure limits, lockout/tagout (LOTO), ladder safety, PPE
• Documentation – as-built drawings, test records, maintenance logs, permits
• Work role – Level I technician works under direct supervision, performs installation of passive
and active equipment
• Exam logistics – 88 questions, 110 minutes, open-book for codes, fee $230
250 Practice Exam Questions (MCQ) with Answers and Rationales
1. What is the minimum coverage percentage required by NFPA 1225 for general areas within a
building requiring an ERCES?
, Page 2 of 137
A) 80%
B) 90%
C) 95%
D) 99%
Answer: C
Rationale: NFPA 1225 and the IFC require 95% coverage of general building areas, while critical areas
such as exit stairs and elevator cabs require 99% coverage.
2. How long must an ERCES battery backup system sustain the bi-directional amplifier under normal
load conditions per NFPA 1225?
A) 4 hours
B) 6 hours
C) 12 hours
D) 24 hours
Answer: C
Rationale: NFPA 1225 requires a minimum of 12 hours of standby battery capacity for the ERCES,
though some AHJs may require 24 hours.
, Page 3 of 137
3. Which article of the National Electrical Code specifically addresses grounding and bonding of
communications systems?
A) Article 250
B) Article 300
C) Article 810
D) Article 820
Answer: A
Rationale: NEC Article 250 covers grounding and bonding for all electrical systems, including
communications systems, to ensure safety and proper operation.
4. A technician is installing a 1/2-inch coaxial cable. What is the primary consequence of violating the
manufacturer's specified minimum bend radius?
A) Increased signal strength
B) Reduced impedance mismatch
C) Increased signal loss and possible cable damage
D) Improved voltage standing wave ratio
Answer: C
, Page 4 of 137
Rationale: Bending a coaxial cable too sharply damages the dielectric and changes the impedance,
resulting in increased signal loss, reflections, and potential cable failure.
5. What is the minimum required Delivered Audio Quality (DAQ) score for intelligible voice
communications in a public safety system?
A) 1.0
B) 2.0
C) 3.0
D) 4.0
Answer: C
Rationale: The DAQ scale ranges from 1 (unusable) to 4 (excellent). A DAQ score of 3.0 or higher is
required for intelligible voice communications.
6. Which building areas are classified as "critical areas" requiring 99% ERCES coverage?
A) Only the fire command center
B) Parking garages and loading docks
C) Exit stairs, elevator cabs, fire command centers, and mechanical/electrical rooms
D) Only areas with windows
NICET In-Building Public Safety Communications
(IB-PSC) Technician Level I exam QUESTIONS AND
DETAILED SOLUTIONS JUST RELEASED
NICET In-Building Public Safety Communications (IB-PSC) Technician Level I exam bank
Point-Form Summary of Exam Coverage
• NFPA 1225 (2022 edition) – primary standard for ERCES design, installation, and maintenance
• NFPA 70 (NEC) – Articles 250 (grounding/bonding), 810 (radio equipment), 820 (coaxial cable
systems)
• NFPA 72 – monitoring of ERCES by building fire alarm system
• IFC – 95% general area / 99% critical area coverage requirements
• RF theory – decibels (dB), dBm, gain, loss, attenuation, isolation, oscillation
• System components – BDA (bi-directional amplifier), donor antenna, distribution antennas,
splitters, couplers, attenuators, terminators
• Cable installation – bend radius, fire stopping, support spacing, connector termination, pull
tension
• Grounding and bonding – NEC Article 250 compliance, ground loops, continuity to building
electrode
• Battery backup – minimum 12-hour standby capacity (NFPA 1225), battery type (SLA, LiFePO₄)
• Coverage testing – DAQ (Delivered Audio Quality) minimum 3.0, signal strength (dBm)
• PIM (Passive Intermodulation) – testing passive components to prevent distortion
• Safety – RF exposure limits, lockout/tagout (LOTO), ladder safety, PPE
• Documentation – as-built drawings, test records, maintenance logs, permits
• Work role – Level I technician works under direct supervision, performs installation of passive
and active equipment
• Exam logistics – 88 questions, 110 minutes, open-book for codes, fee $230
250 Practice Exam Questions (MCQ) with Answers and Rationales
1. What is the minimum coverage percentage required by NFPA 1225 for general areas within a
building requiring an ERCES?
, Page 2 of 137
A) 80%
B) 90%
C) 95%
D) 99%
Answer: C
Rationale: NFPA 1225 and the IFC require 95% coverage of general building areas, while critical areas
such as exit stairs and elevator cabs require 99% coverage.
2. How long must an ERCES battery backup system sustain the bi-directional amplifier under normal
load conditions per NFPA 1225?
A) 4 hours
B) 6 hours
C) 12 hours
D) 24 hours
Answer: C
Rationale: NFPA 1225 requires a minimum of 12 hours of standby battery capacity for the ERCES,
though some AHJs may require 24 hours.
, Page 3 of 137
3. Which article of the National Electrical Code specifically addresses grounding and bonding of
communications systems?
A) Article 250
B) Article 300
C) Article 810
D) Article 820
Answer: A
Rationale: NEC Article 250 covers grounding and bonding for all electrical systems, including
communications systems, to ensure safety and proper operation.
4. A technician is installing a 1/2-inch coaxial cable. What is the primary consequence of violating the
manufacturer's specified minimum bend radius?
A) Increased signal strength
B) Reduced impedance mismatch
C) Increased signal loss and possible cable damage
D) Improved voltage standing wave ratio
Answer: C
, Page 4 of 137
Rationale: Bending a coaxial cable too sharply damages the dielectric and changes the impedance,
resulting in increased signal loss, reflections, and potential cable failure.
5. What is the minimum required Delivered Audio Quality (DAQ) score for intelligible voice
communications in a public safety system?
A) 1.0
B) 2.0
C) 3.0
D) 4.0
Answer: C
Rationale: The DAQ scale ranges from 1 (unusable) to 4 (excellent). A DAQ score of 3.0 or higher is
required for intelligible voice communications.
6. Which building areas are classified as "critical areas" requiring 99% ERCES coverage?
A) Only the fire command center
B) Parking garages and loading docks
C) Exit stairs, elevator cabs, fire command centers, and mechanical/electrical rooms
D) Only areas with windows
